<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>弹出窗口特效</title>
</head>
<body>
<script src="js/jquery-1.12.4.js" type="text/javascript"></script>
<script>
    $(document).ready(function() {
        alert("我欲奔赴沙场征战jQuery，势必攻克之！");
    });
</script>
</body>
</html>